feat: chat topic added

app/Http/Controllers/ChatTopicController.php

@@ -0,0 +1,70 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\ChatTopic;
+use Illuminate\Http\Request;
+
+class ChatTopicController extends Controller
+{
+    // Suggested chat topics (موضوعات پیشنهادی). Active only unless include_inactive=1.
+    public function index(Request $request)
+    {
+        $query = ChatTopic::query();
+
+        if (!$request->boolean('include_inactive')) {
+            $query->where('is_active', true);
+        }
+
+        return response()->json($query->orderBy('order')->get());
+    }
+
+    public function show($id)
+    {
+        return response()->json(ChatTopic::findOrFail($id));
+    }
+
+    public function store(Request $request)
+    {
+        $data = $request->validate([
+            'title' => 'required|string|max:255',
+            'description' => 'nullable|string',
+            'order' => 'nullable|integer',
+            'is_active' => 'nullable|boolean',
+        ]);
+
+        $topic = ChatTopic::create($data);
+
+        return response()->json([
+            'message' => 'Topic created successfully',
+            'topic' => $topic,
+        ], 201);
+    }
+
+    public function update(Request $request, $id)
+    {
+        $topic = ChatTopic::findOrFail($id);
+
+        $data = $request->validate([
+            'title' => 'sometimes|string|max:255',
+            'description' => 'nullable|string',
+            'order' => 'nullable|integer',
+            'is_active' => 'nullable|boolean',
+        ]);
+
+        $topic->update($data);
+
+        return response()->json([
+            'message' => 'Topic updated successfully',
+            'topic' => $topic,
+        ]);
+    }
+
+    public function destroy($id)
+    {
+        $topic = ChatTopic::findOrFail($id);
+        $topic->delete();
+
+        return response()->json(['message' => 'Topic deleted successfully']);
+    }
+}